Guard for woodworking machines



Jan. 28,1930. A. w. STEPHENSON ET AL I 1,745,194

GUARD FOR WOODWORKING MACHINES Filed Aug. 20, 1928 INVENTOR g M A TTORNE y Patented Jan. 28, 1930 UNITED STATES PATENT OFFICE ALPHA W. STEPHENSON AND LLOYD E. GATES, OF HUTGHINSON, KANSAS GUARD FOR WOODWORKING- MACHINES Application. filed August 20, 1928. Serial No. 300,649.

This invention relates to guards for wood working machines and it is particularly designed as a guard to prevent injury to the operator while allowing free access of the work to the tool or tools.

WVood working cutters rotate at a rapid rate. The wood is usually moved up by hand to the cutters. Not infrequently the operator moves his hand close enough to the tool to have it severely injured. Sometimes the wood being operated upon kicks back so that the hand of the operator in the forward position is drawn into contact with cutter. WVe have provided a simple inexpensive adjustable guard which can be readily applied to existing types of machines without altering the construction of the ma chine and which will eiiectually prevent contact between the hand of the operator and the 2 cutters or tools.

The novelty of the invention will be clearly apparent by reference to the following description in connection with the accompanying drawings in which:

Fig. 1 is a plan view of the guard and the tool carrying spindle.

Fig. 2 is a vertical the guard.

Fig. 3 is a sectional view through the guard at right angles to the section shown in Figure 2, the guard being applied and the tool spindle being shown in elevation and Fig. 4: is a sectional view looking in a diametrical opposite direction from that shown in Figure 2.

The guard is shown as consisting of two cylinders 1 and 2. The wall of the cylinder 1 is cut away at 3 to provide a work receiving opening and a similar smaller cut away portion 4t is provided in the wall at a point diametrically opposite the opening 3. The cylinder 2 is provided with internal threads 5 which engage external threads 6 on the up per end of the cylinder 1 so that the cylinder 2 can be raised and lowered to increase or decrease the height of the opening 3 to provide for different thicknesses of material. The lower ring-like foot 7 is adapted to rest upon a table or support of the machine diasectional view through 59 grammatically indicated at 13, Figure 3.

WVhen the cylinder 2 has been adjusted on the cylinder 1, it can be secured in such adjustment by the set screws 8. The spindle 9 of the machine supports the cutter sleeves 1O clamped by a nut 9 so that the clamp 11 co-operating with the collar 11 can secure the cutters 12 between them.

It will be apparent it the foot 7 fits into an opening of substantially equal diameter with the cylinder 1, that the guard will be 60 held concentric with the cutter spindle and that it may freely turn by the openings 3 and t while permitting the work to be introduced or presented to the cutters and prevent the hand of the operator from coming into contact with the cutters. Therefore danger of injury to the operator will be reduced to a minimum. We have shown the device applied to a. standard type of beveling machine, but it is to be understood that the invention is not to be limited to any particular use and that changes in form, proportion and minor details of construction may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

What we claim and desire to secure by Letters Patent is 1. A wood working guard comprising two telescoping hollow members, one of which has a work receiving opening in its wall into which the work may be introduced to be acted upon by the cutters of a wood working machine, the other member being adjustable longitudinally with respect to the first member to vary the size of the opening.

2. A wood working guard comprising two telescoping hollow members, one of which has a work receiving opening in its wall into which the work may be introduced to be acted upon by the cutters of a wood working machine, the other member being adjustable longitudinally with respect to the first member to vary the size of the opening and means for fixing the two H16111LJ61S in any predetermined adjusted position. 95

3. In combination with a wood working machine having a vertical spindle with radial cutter hits, a guard comprising an inner cylinder firmly mounted on the cutter table having a slot in its wall opposite the cut er bits and an outer cylinder threaded on the upper portion of the inner cylinder whereby the outer cylinder may be adjusted longitudinally of the inner cylinder to Vary the Width of the slot in the cylinder.

4. In combination with a wood working machine having a vertical spindle with radial cutter bits, a guard comprising an inner cylinder firmly mounted on the cutter table having a slot in its wall op )osite the cutter bits, an outer cylinder threaded on the unper portion of the inner cvlinder whereby the outer cylinder may be adjusted longitudinally of the inner cylinder to Varv the width of the slot in the cylinder and a set screw for holding the inner and outer cylinder in adjusted position.

In testimony ture s.

whereof we afiix our signa- ALPHA W. STEPHENSON. LLOYD E. GATES. 

